Wideband tunable Q-switched fiber laser using graphene as a saturable absorber

Ahmad, Harith and Muhamad, Farah Diana and Zulkifli, Mohd Zamani and Harun, Sulaiman Wadi (2013) Wideband tunable Q-switched fiber laser using graphene as a saturable absorber. Journal of Modern Optics, 60 (18). pp. 1563-1568. ISSN 0950-0340 E-ISSN 362-3044

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Abstract

An ultra-wide wavelength tuning range, which covers three different band regions consisting of the S-, C-, and L-bands, is proposed and demonstrated for a graphene-based Q-switched erbium-doped fiber laser using a tunable bandpass filter as the wavelength tuning and filtering mechanism. A 3 m length of erbium-doped fiber is used as the gain medium in a ring laser cavity configuration, with absorption coefficients of between 11 and 13 dB m�1 at 980 nm and about 18 dB m�1 at 1550 nm. The tuning range of the Q-switching pulses covers a wide wavelength range of 58 nm, which spans from 1512.5 nm to 1570.5 nm. In addition, the lasing and Q-switching thresholds are considerably low, with respective values of 11.0 mW and 18.4 mW. A repetition rate of 55.3 kHz is obtained at the maximum pump power of 100.4 mW, together with pulse width and pulse energy of 1.6 μs and 25.8 nJ, respectively.

Item Type:	Article (Journal)
Additional Information:	8870/84316
Uncontrolled Keywords:	graphene; saturable absorber; Q-switching; erbium-doped fiber laser; wide wavelength tuning range
Subjects:	Q Science > QC Physics
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science Kulliyyah of Science > Department of Physics
Depositing User:	Dr M Z Zulkifli
Date Deposited:	19 Nov 2020 14:30
Last Modified:	19 Nov 2020 14:30
URI:	http://irep.iium.edu.my/id/eprint/84316

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